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GaAs and GaP (Eg = 2.26 eV) make solid solutions that have the same crystal structure as the parent materials, with As and P randomly distributed throughout the crystal GaPxAs1-x Exists for any value of x. If we assume that the band gap varies linearly with composition between x = 0 and x =1, estimate the band gap for GaP0.5As0.5 .What wavelength of light does this correspond to?
Calculate how many milliliters of 0.100 M HCl shoule be added to how many grams of sodium acetate dihydrate (NaC2H3O2 x 2H2O) at 5 degrees C to prepare 250.0 mL of a 0.100 M buffer at a pH=5.00. At 5 degrees C
D-Glucose, C6H12O6 is a sugar found in many natural products. Google ( or look up) alpha-D-(+)-Glucose, write its LS, and "parcel" e-'s to get the Oxidation number for each component C atom. Show pertinent work.
The choice of precipitating reagent is important. Briefly explain what the consequences would be if excess 6M NaOH solution instead of 6M NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,
An unknown liquid boiling around 185 +/_ 5 degrees C in 5% HCl and in a pH 5.5 buffer but is insoluble in water. Shaking the unknown with p-touluenesulfonyl chloride in aqueous NaOH produces a white precipitate that doesn't dissolve in dilute HCl...
The solutions start out at 22.50 deg C, and the final temperature after reaction is 24.28 deg C. The densities of the solutions are all 1.00 g/mL, and the specific heat of the mixture is 4.2 J/g deg C . What is the enthalpy change for the neutrali..
Zn + 2HCl → ZnCl2 + H2 If 0.600 gram of zinc is used, what is the amount of zinc chloride that is produced in the above reaction?
If the active site of chymotrypsin excludes water when its substrate binds, how is it possible for a water molecule to participate in the second stage of catalysis
How many moles of TNAZ are there in a sample of the material that has a volume of 1.00 cm3? e) If a 1.00 cm3 sample of TNAZ is detonated, how many grams of CO2 are produced? (4) f) What mass of TNAZ would have to be detonated to produce 175 g of wate..
Calculate the statistical mechanical values of Internal Energy, Entropy, Gibbs Energy, Enthalpy and Cvm for H2 (g) at 3000 K.
when 2.25mg of anthracene c14h10 s was burned in a bomb calorimeter the temperature rose by k. calculate the
demonstrate that an excess of hydrogen peroxide was used in the oxidation step of Fe(II) to Fe(III)
say you removed an ice cube at -10 ordmc weighing 36 g from your freezer. now you place the ice cube in a 90 g sample
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